Keith Snow demystified Olive Oil

Olive oil is sold with more jargon than almost any food, and most of it is designed to confuse. Strip away four persistent myths — about grades, ‘light’ oil, cooking heat and storage — and the supermarket shelf suddenly makes sense.

Ask ten shoppers what separates one olive oil from another and most will point to price or a pretty label. The truth is simpler and more useful: it comes down to grade, freshness and honesty, and to a few myths that cloud all three. Clear those up and you will buy better oil, keep it better, and cook with it more confidently.

Myth one: the grades are marketing

They are not — the grade ladder is real and worth learning. Extra virgin is the top: mechanically extracted, no chemistry, within strict quality limits and free of defects. Virgin is the same mechanical process but to a looser standard. Plain ‘olive oil’ (once labelled ‘pure’) is mostly refined oil, stripped of flavour and colour by processing, with a little virgin blended back for taste. The word that matters most on a bottle is extra virgin — though, as any honest hand will tell you, that term is also widely abused.

Grade	How it is made	Flavour	Use it for
Extra virgin	Purely mechanical, strict limits, no defects	Fruity, bitter, peppery	Finishing and everyday cooking
Virgin	Mechanical, looser standard	Milder, may have slight faults	Everyday cooking
‘Olive oil’ / refined	Refined oil plus a little virgin	Neutral, faint	Neutral, high-heat cooking
‘Light’ olive oil	Refined; ‘light’ in colour and flavour	Almost none	Baking; not a diet product

Myth two: ‘light’ olive oil is for dieters

This is the big one. ‘Light’ olive oil has the same calories and fat as any other. The word refers to colour and flavour, not to energy — it is a heavily refined, neutral oil, stripped of the very fruitiness you buy olive oil for. It has its uses in baking, where you want no olive character at all, but as a health choice it is a marketing sleight of hand. If you want the goodness of olive oil, you want the flavour, not the absence of it.

Myth three and four: heat and keeping it

The smoke-point scare says never cook with extra virgin. In a normal home kitchen — sauteing, roasting, shallow-frying — a good extra virgin is perfectly fine and its antioxidants actually help it hold up; you simply would not waste your finest peppery bottle in a deep-fryer. The real enemy is not heat but time, light, air and warmth. Olive oil is a fresh fruit juice that goes stale: buy it in dark glass or tin, keep it cool and closed, and use it within months of opening. A rancid oil, flat and greasy, has taught more people to dislike olive oil than any grade ever did.

The demystified shopping list

• Buy extra virgin for flavour; keep a neutral refined oil for high-heat, no-taste jobs.
• Ignore ‘light’ as a health claim — it means light in taste, not calories.
• Cook with good extra virgin at normal temperatures without fear.
• Prize freshness: dark bottle, harvest date, cool cupboard, months not years.
• Trust your own tongue — fruity, bitter and peppery is good; flat and greasy is old.

Olive oil demystified: common questions

What is the difference between the grades?

Extra virgin is top — purely mechanical, no defects. Virgin is the same process to a looser standard. Plain ‘olive oil’ is mostly refined with a little virgin blended back.

Is ‘light’ olive oil lower in calories?

No. It has the same fat and calories as any olive oil. ‘Light’ describes its pale colour and neutral flavour, not its energy — it is a refined oil.

Can I cook with extra virgin olive oil?

Yes. For normal home cooking — sauteing, roasting, shallow-frying — it is fine and holds up well. Just do not waste your finest bottle deep-frying.

How should I store olive oil?

In dark glass or tin, cool, closed and away from light and heat. It is a fresh juice that goes stale, so use it within a few months of opening.

How do I know if my oil is any good?

Taste it. Fresh, real extra virgin is fruity, a little bitter and peppery. If it tastes flat, waxy or greasy, it is old or poor — not what you want.

General olive-oil grade definitions (extra virgin, virgin, refined/‘olive oil’, ‘light’) and storage guidance; described qualitatively.